Author Question: The table lists the heights (in inches), weights (in pounds), and the date of birth of the members ... (Read 89 times)

iveyjurea · **on:** Jul 24, 2018

The table lists the heights (in inches), weights (in pounds), and the date of birth of the members of a professional soccer team. Does it appear as if there is a relationship between a players height and weight?

1.Yes, the taller the player the more he will likely weigh.
2.Yes, the taller the player the less he will likely weigh.
3.No, it appears as if the players' weights vary regardless of their heights.
4.No, the weight seems to depend more on the birth date.

Question 2

Data were collected on y = price of car (in dollars) and x = age of car (in years) for each car in a sample of 60 used Toyota Camrys. A scatterplot showed a negative linear relationship between x and y. The least squares regression line was fit and the r2 value was computed.
If r2 = 0.55, which of the following is a correct statement?

1.The correlation coefficient is positive, r = 0.55.
2.If the least-squares line is used to predict car price based on number of miles driven, predictions should be within 0.55 of the true price.
3.There is a very strong linear relationship between car price and number of miles driven.
4.For each additional mile driven, car price increases by approximately 0.55.
5.Approximately 55 of the variability in car price can be explained by the linear relationship between car price and number of miles the car has been driven.